Does this also count packages installed in the personal tree?
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Gonzalo MedinaDec 14 '12 at 1:30

No I guess not, I'm not sure "package" means anything in this context other then the units installed by the texlive manager. It's not really related to "latex package" ie a file with .sty extension that you can of course just install by dropping in to a local directory.
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David CarlisleDec 14 '12 at 1:33